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xkcd #173: Movie Seating (20 Oct 2006)
(programming.dev)
A community for a webcomic of romance, sarcasm, math, and language.
Good thing I don't know enough people for me to ever go to the movies in that big a group.
the problem here is technically not you knowing people but that the people you know can also know people that you don't know, expanding the graph beyond the first layer that you personally observe.
tl;dr: don't allow recursive invites